Klimor EVO-T COMPACT, Руководство по эксплуатации и обслуживанию, Страница: 20 / 38

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AUTOMATION AND CONTROL SYSTEM FOR UNITS
EVO-T; EVO-T COMPACT
OPERATION AND MAINTENANCE MANUAL
5. CONTROL MODULES OF EH-EVO-T ELECTRIC
HEATERS
To connect the electrical heater it is necessary to use a ded-
icated power/control module CG-EH-M
Table No. 4 Electric parameters of CG-EH-M module
Name CG-EH-M-18 CG-EH-M-36
Rated voltage (Un) 400V, 50Hz
Insulation rated voltage (Ui) 500V
Rated surge withstand voltage (Uimp) 4kV
Assembly rated current (InA) KLIMOR_DTR_EVO-T_E.SCH_060.x.x
Circuit rated current (InC) KLIMOR_DTR_EVO-T_E.SCH_060.x.x
Rated short-duration withstand current (Icw) 10 kA
Coordination of short-circuit protections 32A
Rated frequency (fn) 50Hz
Typ of the grounding system TN-S
Version Internal
Protection class IP 54
EMC classification Environment 2 [class A]
External mechanical impact protection IK08 IK09
Contamination level 2
Operating conditions 0°C ÷ + 35°C
Dimensions [mm] 384x319x144 448x460x160
Weight [kg] 2,0 8,0
Table no. 5 Control of EH_EVO-T electric heaters
Control type
(application)
Stepless control (electric heater)
Power supply
(voltage)
Function Code Designation
3 phases (3×400V)
1-stage up to 18kW
- heater power supply and protection
- controlling the TK protection of the heater
- PWM signal direct control
- air flow control with the differential pressure gauge (the pressure control as a separate component)
CG-EH-M-18-1
EH EVO-T COMPACT 8000-144-3,
EH EVO-T (COMPACT) 4100-144-3
3 phases (3×400V)
3-stages up to 12kW/
stage
- heater power supply and protection
- heater TK protection control
- HE module controlling the heater
- switching on the subsequent heater stages by the 0-10V signal, one stage with stepless control
- air flow control with the differential pressure gauge (the pressure control as a separate component)
CG-EH-M-36-3
EH EVO-T COMPACT 8000-144-3,
EH EVO-T (COMPACT) 4100-144-3,
EH EVO-T (COMPACT) 1200-216-3,
EH EVO-T9200-216-3,
EH EVO-T9200-324-3,
The SSR solid-state relays and the HE module are used to
provide stepless control of the electrical heater. The HE
module is additionally used for 3-stage control devices.
First stage is running directly by the PWM signal. The
3-stage control is the responsibility of the HE module, which
switches on the individual steps of the heater depending on
the 0-10V control signal from the EVO-T (COMPACT) control
panel controller. One module is running smoothly all the
time, while all others are on/off. This solution allows for very
precise regulation of high-power heaters.
Due to the lack of connectors of mechanical elements
it is possible to use a significant number of switches
(6 switch on/off cycles per minute) without fear of wearing the connectors. Inertion of the heating system causes the
supply temperature to fluctuate only to a small extent.
The system enables feeding the TK connector signal as well
as the signal of the air supply fan pressure gauge. Lack of
the fan compression or the heaters overheating automati-
cally switch off the heater. A contactor constitutes an addi-
tional protection in the event of damaging the SSR relays.
The start-up and 0÷10V signals are fed by the EVO-T AHU
controller.